import { 
  Controller, 
  Get, 
  Post, 
  Put, 
  Delete, 
  Body, 
  Param, 
  Query, 
  ParseIntPipe 
} from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse, ApiParam, ApiBearerAuth } from '@nestjs/swagger';
import { Roles, CurrentUser } from '@app/auth';

// DTOs for category management
class AdminQueryCategoriesDto {
  page?: number = 1;
  limit?: number = 10;
  search?: string;
  status?: 'active' | 'inactive';
  sortBy?: string = 'createdAt';
  sortOrder?: 'ASC' | 'DESC' = 'DESC';
}

class AdminCreateCategoryDto {
  name: string;
  slug?: string;
  description?: string;
  parentId?: number;
  sort?: number;
  status?: 'active' | 'inactive';
  seoTitle?: string;
  seoDescription?: string;
  seoKeywords?: string;
}

class AdminUpdateCategoryDto extends AdminCreateCategoryDto {}

@ApiTags('分类管理')
@ApiBearerAuth()
@Controller('admin/categories')
export class CategoriesController {
  constructor() {}

  @Get()
  @ApiOperation({ summary: '获取分类列表' })
  @ApiResponse({ status: 200, description: '返回分类列表' })
  @Roles('admin', 'editor')
  async findAll(@Query() query: AdminQueryCategoriesDto) {
    // TODO: 实现分类查询逻辑
    return {
      code: 200,
      data: {
        categories: [],
        pagination: {
          page: query.page,
          limit: query.limit,
          total: 0,
          totalPages: 0
        }
      },
      message: '获取成功'
    };
  }

  @Get('tree')
  @ApiOperation({ summary: '获取分类树结构' })
  @ApiResponse({ status: 200, description: '返回分类树结构' })
  @Roles('admin', 'editor')
  async getTree() {
    // TODO: 返回树形结构的分类数据
    return {
      code: 200,
      data: {
        tree: []
      },
      message: '获取成功'
    };
  }

  @Get(':id')
  @ApiOperation({ summary: '获取分类详情' })
  @ApiParam({ name: 'id', description: '分类ID' })
  @ApiResponse({ status: 200, description: '返回分类详情' })
  @Roles('admin', 'editor')
  async findOne(@Param('id', ParseIntPipe) id: number) {
    // TODO: 获取分类详情
    return {
      code: 200,
      data: null,
      message: '获取成功'
    };
  }

  @Post()
  @ApiOperation({ summary: '创建分类' })
  @ApiResponse({ status: 201, description: '分类创建成功' })
  @Roles('admin', 'editor')
  async create(@Body() createCategoryDto: AdminCreateCategoryDto, @CurrentUser() user: any) {
    // TODO: 创建分类
    return {
      code: 201,
      data: null,
      message: '创建成功'
    };
  }

  @Put(':id')
  @ApiOperation({ summary: '更新分类' })
  @ApiParam({ name: 'id', description: '分类ID' })
  @ApiResponse({ status: 200, description: '分类更新成功' })
  @Roles('admin', 'editor')
  async update(
    @Param('id', ParseIntPipe) id: number,
    @Body() updateCategoryDto: AdminUpdateCategoryDto,
    @CurrentUser() user: any
  ) {
    // TODO: 更新分类
    return {
      code: 200,
      data: null,
      message: '更新成功'
    };
  }

  @Delete(':id')
  @ApiOperation({ summary: '删除分类' })
  @ApiParam({ name: 'id', description: '分类ID' })
  @ApiResponse({ status: 200, description: '分类删除成功' })
  @Roles('admin')
  async remove(@Param('id', ParseIntPipe) id: number) {
    // TODO: 删除分类（需要检查是否有文章使用）
    return {
      code: 200,
      data: null,
      message: '删除成功'
    };
  }

  @Get(':id/posts')
  @ApiOperation({ summary: '获取分类下的文章' })
  @ApiParam({ name: 'id', description: '分类ID' })
  @ApiResponse({ status: 200, description: '返回分类下的文章列表' })
  @Roles('admin', 'editor')
  async getCategoryPosts(@Param('id', ParseIntPipe) id: number, @Query() query: any) {
    // TODO: 获取分类下的文章
    return {
      code: 200,
      data: {
        posts: [],
        pagination: {
          page: query.page || 1,
          limit: query.limit || 10,
          total: 0,
          totalPages: 0
        }
      },
      message: '获取成功'
    };
  }

  @Put(':id/sort')
  @ApiOperation({ summary: '更新分类排序' })
  @ApiParam({ name: 'id', description: '分类ID' })
  @ApiResponse({ status: 200, description: '排序更新成功' })
  @Roles('admin', 'editor')
  async updateSort(@Param('id', ParseIntPipe) id: number, @Body() body: { sort: number }) {
    // TODO: 更新分类排序
    return {
      code: 200,
      data: null,
      message: '排序更新成功'
    };
  }
}
